We Are Ophthalmology LTD We Care About Your Health

Over the years, Ophthalmology LTD's name has become associated with the highest quality of comprehensive medical and surgical eye care. Highly trained ophthalmologists David West, Bryan Hammer, Gregory Osmundson, Eric Thomas, Dustin Dierks, Ryan Geraets, Michael Eide, Elizabeth Atchison, and Elise In’t Veld, as well as experienced optometrists Andrea McCann and Emily Walters combine their considerable expertise to give each and every patient the best possible care. Ophthalmology LTD delivers treatment for cataracts, glaucoma, diabetic eye disease, as well as cornea transplants, oculoplastic surgery, retina surgery, vitreoretinal surgery, and pediatric eye care in Sioux Falls.

The Finest Eye Specialists in the Tri-State Area

Ophthalmology LTD brings the finest eye specialists in South Dakota to satellite offices in the tri-state area: Luverne, Pipestone, Worthington and Windom in Minnesota, Rock Valley, Sibley, and Sioux Center in Iowa, as well as Dell Rapids, Madison, Mitchell, and Yankton in South Dakota.


In 1968, Ophthalmology LTD revolutionized eye care by taking a comprehensive approach, bringing patients a full range of vision specialties under one roof. Today, eye care teams across the nation are now mimicking the strategy we have spent more than 50 years perfecting. It is because of this experience and our genuine dedication to our patients that our team is widely considered the finest, most comprehensive group of sub-specialty eye surgeons in the tri-state Siouxland area.

Our Services

Our ophthalmologists have expertise in a wide range of specialties and work as a team to meet your eye care needs.


Not only is cataract treatment the most frequently performed surgery in the United States, it is also one of the most successful. More than 99% of patients who undergo cataract removal rank their vision as significantly improved. Drs. Osmundson, Hammer, Dierks, Eide, In't Veld, and West perform this highly effective procedure.

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Early detection and treatment is the key to preventing vision loss with Glaucoma. More than three million Americans have glaucoma, but only half are actually aware that this "silent thief" is slowly and without warning stealing away their vision, sometimes without any noticeable symptoms. Drs. Osmundson and In't Veld  at Ophthalmology LTD specializes in the diagnosis and treatment of glaucoma.

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Children should have a yearly comprehensive eye exam along with their parents. Many vision problems can be detected early and treated before they become detrimental to a child's development, learning abilities, and every day function. Dr. West of Ophthalmology LTD has 22 years of experience in the evaluation and treatment of children's vision.

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The retina functions much like the film in a camera, and when film is damaged, so is the picture. Our retinal specialists Drs. Geraets, Thomas, and Atchison  offer comprehensive retinal exams and treatment to protect against diseases such as diabetic retinopathy that can damage your retina and vision.

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If a window pane is distorted or marred by imperfections, it is difficult to see out through it clearly. Your cornea is your eye’s window. To keep it clear or to restore it to its proper state, Dr. Eide of Ophthalmology LTD uses his specialty training in corneal diseases to treat dry eye, keratoconus, and other conditions that can cause corneal imperfections.

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When your eyelids, eye sockets, or tear ducts malfunction, or a tumor threatens your vision, Ophthalmology LTD oculoplastic surgeon Dr. Hammer can help. Specializing in procedures that restore clear vision as well as a more youthful appearance, Dr. Hammer treats and manages a wide variety of ocular conditions.

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We are a team of passionate professionals with
caring for patients in South Dakota, Minnesota, & Iowa.

Have a look around, then call, request an appointment online, or come by to learn more about how our team of eye experts can help you and your family.

  • Debbie N.

    wonderful staff and caring doctors. Dr. Geraet is very knowledgeable and always explains things in an easy to understand way.

  • Marsha S.

    Wonderful care from start to finish. Everyone was very friendly and concerned for my health. The staff explained the process as it went along and Dr Eric Thomas was great. I can’t imagine a higher quality of care than the... read more

  • Rafael P.

    Very professional, state-of-the-art equipped

  • Micki S.

    The customer service from the minute I walked into the door to the minute I left was timely, kind, communicative and knowledgeable!

  • Byron P.

    New to the community and in need of an Ophthalmologist. Had heard Ophthalmology Ltd. had excellent physicians and now know this is not only true for the MD’s but their professional support staff. Everyone I encountered looked me in the... read more

  • Judy W.

    I am very grateful there is a treatment Eyelea and Dr Gerearts helping guide me through this process. The staff is awesome.

  • Kathleen F.

    Dr. Dustin Dierks and his entire team attended to me as if I was their only patient for the day. The staff explained the tests they administered, listened to my concerns, and explained my diagnosis. They also took the time... read more

  • Ruth B.

    Very efficient and seemed knowledgeable! I would return!

  • Karen F.

    Very thorough visit by extremely skilled personnel. Dr. McCann’s comprehensive examination and explanations satisfy any questions one might have. She’s personable and professional and quite knowledgeable.

  • Eileen E.

    This was my first visit to your facility being a new resident of Sioux Falls from the front desk to all required areas I was impressed with the professionalism of staff I found the employees went above and... read more

  • Wayne S.

    Dr Thomas has done a great job with my branch vein occlusion.

  • Brian P.

    My doctor has always done everything he could do to help me with my mystery eye problem and his staff of nurses are top of the line and always polite !!

  • Linda L.

    Good always pleasant i staff in Yankton and most of the staff in Sioux Falls the receptionist that is doing outside calls need some customer service can help rude on phone otherwise great staff

  • Robin P.

    wonderful man and Dr. very knowledgeable about his work thank you so much

  • Richard L.

    I felt very comfortable with the nurses and Elizabeth A. Atchison M.D.

  • Beth O.

    Everyone is friendly and professional. I appreciate the care they take in asking everyone to wear a mask. Dr. Dierks seems familiar with my history and concerned about my eye health. I am very pleased with the... read more

  • Rosemary A.

    Very pleased with care and thoughtfulness displayed by everyone including Dr. Dierks. They made me feel like taking care of me was a priority while I was there.

  • Dane K.

    I've been a patient of Dr. Eide at Ophthalmology LTD for over ten years now. He and the staff there are second to none. Dr. Eide has done cataract surgery on both of my eyes and follows up... read more

  • Clyde F.

    The experience I had was great , friendly , caring , very thorough !! I will highly recommend Opthalmology LTD . & Dr West ! Great experience good results

  • Lisa E.

    I had a referral appointment made within 24 hours of being told I most likely have brain tumors behind my eyes. I was greeted with a smile as I entered the office. My wait to see doctor was less than... read more

  • Tanya H.

    Ophthalmology LTD carefully handled my vision issue. They were patient, kind and friendly. Thank you for your care.

  • Lowell H.

    Great Doctors and Staff. Enjoy the interaction.

  • Peter I.

    Good thorough annual exam. They ask questions to make sure nothing is overlooked and answered my concerns.

  • William D.

    Fast service & knowledgeable/friendly staff.

  • Cathy C.

    Very professional care! Short wait after registering. Dr and nurses explain procedures in ways easily understood.

  • Barb S.

    Very thorough and explained everything

  • Ted U.

    Everything is always on time. Everyone are so friendly. Overall a great experience. Thanks so much

  • Clara B.

    Dr Geraets is a great doctor. My eyes are getting better all the time. He’s very professional and informative.

  • Lynn A.

    From the minute you walk in the door you are cordially greeted. The same friendliness continues as you go through your appointment.
    Dr. west is top notch. He keeps me completely informed of what is going on and changes...
    read more

  • Paul A.

    On time appointments and very friendly staff.

  • Randy J.

    Very informative, explained everything they were doing and why. Explained what to expect and what to prepare for surgery. Very professional am so glad dr Clark sent me to them.

  • Steve K.

    Late on a Friday afternoon I had an urgent eye issue. I called Opthalmology LTD hoping they could fit me in before closing for the weekend. One hour later I was waiting in an exam room with eyes... read more

  • Lana Z.

    Everyone is very pleasant and makes you feel comfortable.. they explain what they are going to do and all do it with kindness.

  • Karla H.

    Very professional and caring! Dr. Thomas and staff did a wonderful job! Totally appreciate them!

  • Sandra H.

    Everyone was helpful and friendly.

  • William M.

    Very nice, pleasant and professional staff, and the Dr. Explained everything very well. I would recommend their services to anyone.

  • JOHN L.

    It was a wonderful experience to find a truly certified retinal specialist in Sioux Falls. I have been traveling to Chicago for this purpose in the past.J. David Larsen III

  • Mark K.

    It is a good experience whenever I go there. They never try to pressure you to have surgery. I appreciate their honesty. I would highly recommend Dr Diercks.

  • Stefany B.

    I would highly recommend Dr. Walter's at Opthalmology LTD.

  • Kay D.

    I was having some issues with floaters and when I called they got me in immediately. Dr. McCann is so reassuring and so easy to talk with. She made me feel comfortable.

  • Cindy W.

    They are all very kind , and no one rushed me .

  • Jamie G.

    Both of my children go to Dr West at Ophthalmology Center. I appreciate the thorough eye examine and supportive staff.

  • Dawn A.

    I went to see Dr Dierks for a recheck of my eyes. My vision had gotten somewhat cloudy and colors were not as vivid as they should be. He was able to determine the cause and fix the problem with... read more

  • Dean J.

    Had a very good and thorough exam it put my at ease about my eye problems. Very happy I went to Ophthalmology LTD.

  • Shelly P.

    From their quick response to my letter of inquiry, when I was preparing to move to Sioux Falls, to my first appointment this week, I have been met by both friendly and professional staff, whether they were directly assisting me... read more

  • Leora C.

    Drs and staff are very cordial .Take the time to make sure the patient is comfortable with the procedure that is needed. Would defitly recommend them

  • Julie N.

    Very skilled doctors. Pleasant and knowledgeable support staff.

  • Sharon K.

    I highly recommend Dr. Atchison and her team!! The team was very compassionate and calmed my fears when I was referred for my emergency detached retina in June 2021. She preformed the surgery the same afternoon with a successful... read more

  • Sharon L.

    I highly recommend Dr. Atchison and her team!! The team was very compassionate and calmed my fears when I was referred for my emergency detached retina in June 2021. She preformed the surgery the same afternoon with a successful... read more

  • Pamela K.

    I went to Opthalmology LTD
    and received a thorough cataract exam by their friendly, professional staff. I definitely recommend their office for your vision needs!